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Number Bonds Worksheet (to 10 and 100)

Mental maths lesson 1: Number bonds to 10 and 100 · Set 850 · 40 questions
TalentJR

How to do it in your head (Make 10): Bonds to 10: 1 + 9, 2 + 8, 3 + 7, 4 + 6, 5 + 5. Bonds to 100: the ones make 10, and the tens make 9 (because the ones already gave one ten). If the number ends in 0, the tens make 10: 40 + 60 = 100.

NameDateTime takenScore ___ / 40
  1. 1.52 + ? = 100
  2. 2.69 + ? = 100
  3. 3.30 + ? = 100
  4. 4.17 + ? = 100
  5. 5.7 + ? = 10
  6. 6.5 + ? = 10
  7. 7.1 + ? = 10
  8. 8.4 + ? = 10
  9. 9.43 + ? = 100
  10. 10.21 + ? = 100
  11. 11.3 + ? = 10
  12. 12.6 + ? = 10
  13. 13.63 + ? = 100
  14. 14.9 + ? = 10
  15. 15.58 + ? = 100
  16. 16.57 + ? = 100
  17. 17.16 + ? = 100
  18. 18.78 + ? = 100
  19. 19.67 + ? = 100
  20. 20.8 + ? = 10
  21. 21.33 + ? = 100
  22. 22.77 + ? = 100
  23. 23.23 + ? = 100
  24. 24.36 + ? = 100
  25. 25.50 + ? = 100
  26. 26.48 + ? = 100
  27. 27.45 + ? = 100
  28. 28.28 + ? = 100
  29. 29.49 + ? = 100
  30. 30.2 + ? = 10
  31. 31.62 + ? = 100
  32. 32.26 + ? = 100
  33. 33.65 + ? = 100
  34. 34.53 + ? = 100
  35. 35.51 + ? = 100
  36. 36.32 + ? = 100
  37. 37.22 + ? = 100
  38. 38.87 + ? = 100
  39. 39.13 + ? = 100
  40. 40.56 + ? = 100

Answer key

  1. 48
  2. 31
  3. 70
  4. 83
  5. 3
  6. 5
  7. 9
  8. 6
  9. 57
  10. 79
  11. 7
  12. 4
  13. 37
  14. 1
  15. 42
  16. 43
  17. 84
  18. 22
  19. 33
  20. 2
  21. 67
  22. 23
  23. 77
  24. 64
  25. 50
  26. 52
  27. 55
  28. 72
  29. 51
  30. 8
  31. 38
  32. 74
  33. 35
  34. 47
  35. 49
  36. 68
  37. 78
  38. 13
  39. 87
  40. 44

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